Improvement in lime-kilns



STATES PATENT OFFICE.

IMPROVEMENT IN LIME-KILNS.

Specification forming part of Letters Patent No. 120,378, dated October31, 1871 antedated OctoberlO, 1871.

To all whom 'it may concern:

Be it known that we, MICHAEL GROH and J. V. NVEITZ, of Cleveland, in thecounty of Cuyahoga and State of Ohio, have invented certain new anduseful Improvements in Lime- "Kilns,

' Fig. 3, a vertical section of the base in direction of the line m m,Fig. 2; Fig. 4, a transverse sec- 4 tion, in direction of the line J; x,Fig. 1.

Like letters of reference refer to like parts in the different views.

This invention consists in combining, with a lime-kiln, a steam-boilerfor the purpose of snpplying steam to the fire-grates, therebypreventing said grates from being rapidly burned out; also, that saidboiler serves as a flue for the stack or furnace, and having' awater-lining instead of fire-brick for its preservation.

The following is a description thereof:

This kiln is constructed in two sections, A B, Fig. 1, of which A is thelower section or base, and B the stack or flue. D, the outside or shellof the kiln, is made of sheet or plate-iron riveted together, whereby astrong and durable outer wall is obtained for the support of the innerwall or lining and furnaces. In the lower section of the kiln are builtthe furnaces C, Fig. 2, one on each side, as shown in Fig. 1, and which,as will be seen in Fig. 3, are built up in the wall or sides E, whichalso forms the lining of the section or base. These furnaces are builtup of fire brick, and, as will be observed, form no part of the outerwall or case of the kiln; hence, as the lining and furnaces may becomeinjured by the fire, it can be easily taken down and rebuilt lorrepaired as may be necessary, without in the least disturbing the shell,it still remaining securely and firmly upon the ground while the repairsare being made. The upper section of this kiln is constructed entirelyof iron, having a water-space, I, between the outer and inner walls, andwhich constitutes the boiler. This boiler is fitted to and rests uponthe lower section, as shown in Fig. 2, in which it will be seen that itforms the iiue or cupola of the kiln. VBy thus forming the upper sectionwith double walls,

having a water-space between them, no lining of tire-brick or othermaterial is required to protect the flue from being burned out. Thissection may be extended down near to the furnaces, and thus dispensewith much of the brick-work immediately above them. By this arrangementit will be obvious that the heat of the furnaces, as it ascends, passesthrough the boiler, thereby heating the water to such a degree as togenerate a high pressure of steam, a part of which is conducted downthrough the pipe J to the under side of the iire-grates through theash-pit F immediately under the doors of the furnaces, and therebypreventing them from being rapidly burned out, and at the same timeimproving the quality of the lime by adding to its whiteness andstrength. The steam may also be used for driving an engine, which may beemployed about the kiln for sundry purposes-pumping water, elevatingstone, 85e. Lime-kilns are usually constructed of stone, laid up withmuch care, and of great thickness at the base in order to insurestrength to the structure, which, in' consequence of the great heat towhich it is subjected, will, after a short while, crack and crumbledown, thereby causing great loss and expense, as the entire structuremust be rebuilt in consequence of such injury. Whereas a kiln built inthe manner as above described, with an independent outer wall of iron,cannot crack and crumble down, though the lining may have been burnedout, which, as above said, can be easily replaced or rebuilt without inany way effecting the shell. A kiln thus constructed is much cheaperthan one built in the ordinary way, and, as will be obvious, is far moredurable.

What we claim as our improvements, and desire to secure by LettersPatent, is-

The lime-kiln herein described, consisting of the sheet-iron section Alined with fire-brick, and provided with the furnaces C C and chute Hand the upper double section B, forming a steamboiler, and connected bya steam-pipe, J, with the ash-pits F F, when all these parts areconstructed and arranged as shown, and for the purpose set forth.

MICHAEL GROH. J. V. WEITZ. Witnesses:

W. H. Brummen,

FRANK S. ALBEN. (153)

